CVE-2025-26909: Hide My WP Ghost Path Traversal Flaw

CVE-2025-26909 Overview

CVE-2025-26909 is a Local File Inclusion (LFI) vulnerability affecting the Hide My WP Ghost WordPress plugin. The vulnerability stems from improper control of filename for include/require statements in PHP, allowing unauthenticated attackers to include arbitrary local files on the server. This can lead to remote code execution (RCE) by leveraging PHP's file inclusion mechanisms to execute malicious code stored in uploaded files or log files.

Critical Impact

This unauthenticated Local File Inclusion vulnerability can escalate to Remote Code Execution, potentially allowing complete compromise of WordPress installations running vulnerable versions of Hide My WP Ghost.

Affected Products

• Hide My WP Ghost plugin versions up to and including 5.4.01
• WordPress installations using vulnerable Hide My WP Ghost versions
• All sites with the wpplugins:hide_my_wp_ghost component installed

Discovery Timeline

• 2025-03-27 - CVE-2025-26909 published to NVD
• 2025-06-25 - Last updated in NVD database

Technical Details for CVE-2025-26909

Vulnerability Analysis

This vulnerability is classified as CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program). The Hide My WP Ghost plugin fails to properly sanitize user-controlled input before using it in PHP include or require statements. This architectural flaw allows attackers to manipulate file paths and include arbitrary files from the local filesystem.

The vulnerability is particularly dangerous because it requires no authentication to exploit (PR:N) and can be triggered remotely over the network (AV:N) without any user interaction (UI:N). When successfully exploited, attackers can achieve complete compromise of confidentiality, integrity, and availability of the affected system.

Root Cause

The root cause of CVE-2025-26909 lies in insufficient input validation within the Hide My WP Ghost plugin's file handling mechanisms. The plugin processes user-supplied input to determine which PHP files to include, but fails to implement proper sanitization or path validation. This allows attackers to inject path traversal sequences or specify arbitrary file paths that the PHP interpreter then includes and executes.

PHP's include() and require() functions execute any PHP code contained within the included file, making LFI vulnerabilities particularly dangerous when combined with techniques such as log poisoning, uploaded file inclusion, or PHP wrapper exploitation.

Attack Vector

The attack vector for this vulnerability is network-based, requiring no privileges or user interaction. An attacker can craft malicious HTTP requests to the vulnerable WordPress endpoint, manipulating parameters to include arbitrary local files. Common exploitation techniques include:

The exploitation typically follows a pattern where the attacker identifies the vulnerable parameter, then uses path traversal sequences (such as ../) to navigate the filesystem. By including sensitive files like /etc/passwd or WordPress configuration files, attackers can extract credentials. More critically, by using PHP wrappers like php://filter or including log files after injecting PHP code into them, attackers can achieve remote code execution.

Detection Methods for CVE-2025-26909

Indicators of Compromise

• HTTP requests containing path traversal sequences (../, ..%2f, ..%252f) targeting WordPress plugin endpoints
• Unusual access patterns to /wp-content/plugins/hide-my-wp/ directory
• Log entries showing attempts to access sensitive system files like /etc/passwd or wp-config.php
• Requests containing PHP wrapper protocols such as php://filter, php://input, or data://

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block path traversal patterns in requests targeting WordPress installations
• Monitor WordPress access logs for requests containing file inclusion payloads or attempts to access files outside the web root
• Implement file integrity monitoring on critical WordPress files to detect unauthorized modifications
• Configure intrusion detection systems to alert on HTTP requests containing common LFI signatures

Monitoring Recommendations

• Enable verbose logging for WordPress and PHP to capture detailed request information
• Monitor for new or unexpected PHP files created in upload directories or temporary folders
• Set up alerts for processes spawned by the web server user that attempt to access sensitive system files
• Regularly review plugin activity logs for anomalous behavior patterns

How to Mitigate CVE-2025-26909

Immediate Actions Required

• Update Hide My WP Ghost plugin to a version newer than 5.4.01 immediately
• If immediate patching is not possible, temporarily deactivate the Hide My WP Ghost plugin
• Review WordPress access logs for signs of exploitation attempts
• Conduct a security audit of the WordPress installation to identify potential compromise

Patch Information

Organizations should update the Hide My WP Ghost WordPress plugin to the latest available version that addresses CVE-2025-26909. The vulnerability affects all versions through 5.4.01. Detailed vulnerability information is available through the Patchstack WordPress Vulnerability Report.

Workarounds

• Implement server-level restrictions using open_basedir PHP directive to limit file access to the WordPress directory
• Deploy a WAF with rules specifically designed to block LFI attacks and path traversal attempts
• Disable unused PHP wrappers in the PHP configuration to reduce the attack surface
• Restrict file permissions on sensitive configuration files and system directories

# PHP configuration hardening example
# Add to php.ini or .htaccess
open_basedir = /var/www/html:/tmp
allow_url_include = Off
allow_url_fopen = Off